Waste cutter



p 1 M. L, HUDSON 2,384,031

WASTE CUTTER Filed May 1, 1944 WflJTE I za 4 l y/ MaliaaL/YuafmaPatented Sept. 4, 1945 V WASTE CUTTER Monlton L. Hudson, West Asheville,N. C., assignor to American Enka Corporation, Enka, N. 0., a

corporation of Delaware Application May 1, 1944, Serial No. 533,629

12 Claims.

This invention relates to a mechanism for cutting waste strand materialfrom rotating supports. More particularly the invention is concernedwith a knife mechanism adapted to be used for-the removal of waste yarnfrom driven godets in order that the waste may be removed or strippedfrom the godets without the necessity of stopping an entire machinewhenever the waste accumulated on its godets requires removal.

In the production of rayon the usual viscose process involves theextrusion of the viscose solution into an acid spin bath and theconducting of the formed thread or yarn to a collecting bobbin or pot,the thread consisting of a multiplicity of filaments being subjected tostretching during its passage to the collecting device by beingpropelled over driven godets operating at different speeds to effect thedesired stretch. After a period of operation. parts of filaments whichhave become severed from the thread body in its passage to thecollecting device become attached to the respective godets and a bandofwaste yarn may be gradually built thereon. The presence of such bandsof waste on the godets is objectionable and in fact these accumulationsof waste will interfere with the efliciency of the equipment andeventually cause the yarns passing thereover to be entirely ruptured. Inorder to remove such waste, it is desirable to cut the bands while thegodets are in operation as the godets are driven continuously and themachines themselves are seldom shut down.

It is an object of the present invention to provide a waste cuttingmechanism in which the knife thereof is arranged to rotate with arotating godet or the like and to be moved to cut through the band ofwaste while the godet is being rotated.

The invention further contemplates a portable waste cutter for rotatinggodets and the like in which a knife thereof is caused to be moved to aposition for cutting the waste upon the partial positioning of themechanism upon a guiding spindle extending from the godet, and in whichthe waste will be severed from the godet upon the further movement ofthe device upon the guiding spindle.

These and other objects and advantages will appear more fully from thefollowing detailed description of the preferred embodiment of thisinvention when read in conjunction with the accompanying drawingwherein:

Figure 1 is a perspective view of a godet having an extended guidingspindle over which a cutting mechanism formed in accordance with thisinvention has been partially applied;

Figure 2 is a longitudinal elevation of the structure shown in Figure 1partially broken away to illustrate the manner in which the knife iscaused to be operated and the position which the parts formed as a partof lug ll.

assume when the mechanism has reached the end of its movement during thecutting operation; and

Figure 3 is a partial view of the structure specifically' illustrated inFigure 2 in which the mechanism is shown in its initial position beforebeing moved over the guiding spindle sufliciently to cause the knife toassume its operative position.

In the drawing, a corrugated glass godet I, such as is used in thespinning of rayon yarn, is shown as mounted upon a shaft 2. The godet isclamped to bushing 3 by means of a mandrel 4. Mandrel 4 is provided withan axial extension or guide post 5 which extends beyond the edge of thegodet a sufficient distance to permit the guiding and supporting of thecutting mechanism 8. The cutting mechanism 6 may be utilized inconnection with any one of a number of godets since it is a portabledevice and may be removed from or applied to the extensions or guides 5of various godets or similar yarn supports.

The cutting mechanism comprises a housing 1 having at one end a recess 8adapted to receive the guide 5 of the godet. The end of the housingopposite that containing the recess is reduced to provide an annularextension upon which handle 9 ,is secured. The handle is rotatablysecured upon the housing by means of ball bearing assembly III as shownin Figure2.

The L-shaped member is a lug or bracket which may be formed integralwith housing I and is shown extending laterally therefrom. Lug II isbifurcated as at I2 for the purpose of receiving arm l3 between itsupstanding legs and the arm I 3 is pivoted between the legs of the lugby means of pin H. g

A spring I5 is positioned within a bore in the lug II as shown in Figure2 and bears upon the lower surface of arm lit at a point in advance ofpivot pin H in a manner to bias the said arm upwardly. Knife blade ii ofthe cutting device is preferably made of stainless steel and isremovably mounted in arm I 3. Arm I3 is slotted at I! to receive theknife blade. Blade I8 is secured in position by means of a headed pinl8, which pin is normally prevented from being dislodged from the arm bymeans of an offset extension I! Thepin, however, may be dislodged whenthe cutting assembly and godet are disengaged, by depressing arm l3 in amanner as shown in Figure 3. When arm I3 is depressed sufficiently, thehead of, pin it clears the extension l9 and the pin may then be readilyremoved.

The end of arm I! remote from blade I6 is pivotally connected to a link20 by means of pin 2!. Link 20 is formed of a sleeve 22 closed at itsupper end with legs extending therefrom between which the said arm issecured. Within the sleeve 22 a spring 23 is mounted, which spring hasconnected to its lower end a link 24. A pin 25 is utilized to connectthe spring'to the link 24 and the ends of the pin extend into slots asat 26 .formed adjacent the lower end of the sleeve 22. Due to thisarrangement, the upward movement of the link 24 within the sleevecompresses spring 23, thus applying a. resilient pressure against theclosed end of link 20 which in turn urges arm l3 upwardly about itspivot so that blade [6 will be moved downwardly to operative position asshown in Figure 2. 7

Link 24 is pivotally connected to the free end of a dog 21, which dog ismounted within a slot- 28 arranged in housing I from which lug lllaterally extends. 'I'he'dog 21 is pivotally connected to the housing Iat 29. Housing 1 is provided With a recess 8 into which the slot for thedog 21 opens. Thus, when the cutting assembly is disengaged from thegodet, one end of dog 2! is permitted to move downwardly into the recess8 as in Figure 3.

In operation the cutter is held by its handle and slipped over therotating guide 5. Figure 3 shows the cutter with the guide it isentering, and the knife blade is clear of the godet. As the. unit ispushed further, guide contacts dog 21 and causes the dog to moveupwardly. Dog l9 pushes against the spring 23 thru link 24, thus causingarm I 3 to move into a position where the knife is in the groove on therotatin godet as shown in Figure 1. The knife assembly then rotates withthe godet. As the cutter is pushed still further, the knif contacts andsevers the band of waste material, after which the unit is withdrawn.

It is believed that the foregoing description conveys a goodunderstanding of the objects and advantages of this invention. It is tobe understood, however. that while I have described one specific form ofm invention, modifications may godet, a handle axially mounted on theunit and rotatably secured thereto, a lateral bracket on the unitadjacent its end remote from said handle, a knife supporting arm mountedfor oscillation on said bracket, meansextending into the unit andconnected to the arm for causing the movement of the arm upon insertionof the device upon a guide, a spring normally urging the arm in adirection to cause the means to extend into the unit, and a knifedetachably connected to the end of the arm remote from the said means.

5. A knife assembly for cutting a band of strandular material from arotating godet comprisinga unit having a portion cooperating withguiding means located axially of a godet, a handle on the unit, alateral'bracket on the unit adjacent one end, a knife mounted foroscillation on the bracket, a spring engaging the knife to urge it tomove about its pivot point, means arranged between the knife and saidguiding means to cause the knife to be oscillated to operative positionas the knife assembly is moved relative to the guiding means to therebysever the strandular band upon the godet. Q

6. A knife assembly fOr cutting a band of strandular material from arotating godet comprising a unit having a portion for cooperating withaxially arranged means of a godet to guide the assembly into operativerelation with the be made in the shape and arrangement of the materialis to be cut for properly aligning the r same, a handle axially mountedon the un t and rotatably secured thereto, a lateral extension on saidunit, an arm mounted on said extension. and a knife connected to the armand extending in a direction longitudinally of the device.

2. A device for cutting waste strandular material from a rotatingsupport comprising a rotatable unit provided with a recess adapted to befitted over a guide extending from the support and rotated therewith, abracke laterally extending from the unit, a knife mounted foroscillation on said bracket, and means for oscillating the knife tocutting position.

3. A device for cutting waste strandular material from a rotating godetcomprising a rotatable unit provided with axially arranged guidingmeans, a bracket laterally extending from the unit, a knife mounted foroscillation in said bracket, means connected to the knife foroscillating the same to cuttin ositions, and means normally urging theknife to inoperative position.

4. A knife assembly for cutting a band of strandular material from arotating godet comprising a unit provided with a recess adapted to befitted over a guide extending axially from a godet, a lateral bracket onthe unit, a knife blade holder pivoted to the bracket, means normallyurging the knife blade holder to move in onedirection, means extendinginto the unit and having a portion for engaging the guiding means of thegodet, a link connecting said last mentioned means to the knife bladeholder, a knife blade detachably secured in the free end of the knifeblade holder by means of a headed pin, said bracket being provided withan extension which normally overlies the head of said pin to preventsits removal until the blade and knife'blade holderare oscillated to aninoperative position to cause the pin to clear said extension, wherebyupon the movement of the knife assembly with respectto the axiallyarranged guiding mean-s'of the godet the knife blade holder and theknife blade will pivot in a direction counter to that in which they arenormally urged so that the knife blade will be placed in operativeposition and sever the strandular band upon the godet upon furthermovement of the cutting assembly with respect to said guide means.

7. A knife assembly for cutting a band of strandular material from arotating godet com-- prising a unit provided with a recess adapted to befitted'ovei'='a* guide extending axially from a.

godet, a lateral bracket'on the unit, a knife pivoted to the bracket, aspring engaging the knife at one side of the pivot point, a dog mountedwithin the unit and having a portion arranged for movement within thebody recess, link means .connecting the knife to the dog whereby uponthe positioning of the knife assembly over the laterally extending guideof the godet the dog within the body recess will engage the said guideand cause the knife to pivot-in a direction counter to that urged by thespring and the knife will thereby be placed in operative position tosever the strandularband upon the godet upon further movement ofthecutting assembly upon the guide.

8. A knife assembly for cutting a band of strandular material from arotating godet comprising a unit having a' portion cooperating withguiding means located axially of a-godet, a handle mounted on the unit,a knife pivoted to the unit, a spring engaging the knife at one side ofthe .pivot point, a link means connected to the knife at the oppositeside of the pivot point, said link means engaging the guiding meanslocated axially of the godet and causing the knife to move against thetension of the spring for moving the knife to Operating position as thesaid connecting means is further moved with respect to the said guidingmeans.

9. A knife assembly for cutting a band of strandular material from arotating godet comprising a unit provided with a recess adapted to befitted over a guide extending axially from a godet, a handle axiallymounted on the unit and rotatably secured thereto, a knife holderpivoted to the unit, a spring contained within the unit and engaging theife holder at one side of its pivot point, a dog mounted within the unitand having a portion arranged for movement within the unit recess, ahollow link connected to the knife holder adjacent its end remote fromthe point of engagement of the spring with the support, a link connectedto the dog and to the hollow link, said link being provided with a pinwhich extends through slots in the wall of the hollow link to providefor a loose connection between the link and hollow link, a spring withinthe hollow link normally urging the links apart, a knife bladedetachably secured in the unit being provided with an extension whichnormally overlies the head of said pin to prevent its removal until theknife and holder are oscillated to an inoperative position to cause thepin to clear said extension, whereby upon the positioning of the knifeassembly over the laterally extending guide of the godet and dog withinthe unit recess will engage the said guide and cause the knife holderand knife blade to pivot in a direction counter to that urged by thespring and the knife blade will thereby be moved to sever thestrandularband upon the godet as the cutting assembly is moved over theguide.

10. A knife assembly for cutting a band of strandular material from arotating godet comprising a unit provided with a recess adapted to befitted over a guide extending axially from a godet, a handle axiallymounted on the unit and rotatably secured thereto, a knife pivotallymounted on the said unit, a spring contained within the unit andengaging the knife at one side of its pivot point, a dog mounted withinthe unit and having a, portion arranged for movement within the unitrecess, a hollow link connected to the knife adjacent its end remotefrom the point of engagement of the spring therewith, a link connectedto the dog and to the hollow link, said link being provided with a pinwhich extends through slots in the wall of the hollow link to providefor a loose connection between the link and hollow link, a spring withinthe hollow link normally urging the link outwardly therefrom, wherebyupon the positioning of the knife assembly over the laterally extendingguide of the godet the dog within the unit recess will engage the saidguide and cause the knife to pivot in a direction counter to that urgedby the spring within the unit and the knife will thereby be moved tosever the strandular band upon the godet as the cutting assembly ismoved over the guide.

11. A knife assembly for cutting a band of strandular material from arotating godet comprising a unit provided with a recess adapted to befitted over a guide extending axially from a godet, a handle axiallymounted on the unit and rotatably secured thereto, a lateral bracket onthe unit adjacent its end remote from the handle, a knife blade holderpivoted to the bracket with its ends extending beyond the bracket, aspring contained within the bracket engaging the knife blade holder at;one side of the pivot point, a dog mounted within the unit and having aportion arranged for movement within the unit recess, a hollow linkconnected to the knife blade holder adjacent its end remote from thepoint of engage ment of the spring with the support, a link connectingthe dog and the hollow link, said link being provided with a pin whichextends through closed slots in the wall of the hollow link to providefor a loose connection between the link and hollow lnk, a spring withinthe hollow link normally urging the links apart and a knife bladedetachably secured in the free end of the knife blade holder by means ofa headed pin, said bracket being provided with an extension whichnormally overlies the head of the pin to prevent its removal until theknife and knife blade holder are oscillated to an inoperative positionwhere the pin is clear of said bracket extension, whereby upon thepositioning of the knife assembly over the axially extending guide ofthe godet the dog within the body recess will engage said guide andcause the knife blade holder and knife blade to pivot in a directioncounter to that urged by the spring within the bracket and the knifeblade will thereby be moved to sever the strandular band upon the godetas the cutting assembly is moved over the guide.

12. The combination of a godet and knife assembly for cutting waste yarnbands from the godet while it is in operation, comprising a godet, adrive shaft therefor, an axially arranged spindle extending beyond thegodet, a unit fitting over the said spindle, a handle axially mounted onthe unit and rotatably secured thereto, a lateral bracket on the unitadjacent its end remote from the handle, a knife blade holder pivoted tothe bracket with its ends extending beyond the bracket, a springcontained within the bracket engaging the knife blade holder at one sideof the pivot point, a dog mounted within the unit and having a portionarranged for movement within the unit recess, a hollow link connected tothe knife blade holder adjacent its end remote from the point ofengagement of the spring with the support, a link connecting the dog andthe hollow link, said link being provided with a pin which extendsthrough closed slots in the wall of the hollow link to provide for aloose'connection between the link and hollow link, a spring within thehollow link normally urging the links apart and a knife blade detachablysecured in the free end of the knife blade holder by means of a headedpin, said bracket being provided with an extension which normallyoverlies the head of. the pin to prevent its removal until the knife andknife blade holder are oscillated to an inoperative position where thepin is clear of said bracket extension, said unit being adapted to bewithdrawn sufficiently to cause the dog to disengage the godet spindlebut being adapted to be moved over the guide whereby the dog will causethe knife to be moved against the tension of the spring for positioningthe knife in operative position to sever the band of yarn on the godet.

MOULTON L. HUDSON.

